This MOS consists of three small steps separated by intervals of 5L-5L-4L. The temperament it belongs to is called Squares because because the number of generators it takes to get to each of the primes 3, 5 and 7 is a square (3=-4 generators, 5=-16, 7=-9). This puts the generator between 6/17edo (423.529) and 5/14edo (428.571 cents).